Nhon Do and  Hien Nguyen,  Model for Knowledge Representation using Sample Problems and Designing a Program for Automatically Solving Algebraic Problems.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2010, vol. 42(6). 708 - 713
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/12001.